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Related Concept Videos

Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Pneumothorax-I01:26

Pneumothorax-I

A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
Cellular Injury I: Introduction01:00

Cellular Injury I: Introduction

Cellular injury occurs when a cell cannot maintain homeostasis or adapt to stressors such as hypoxia, toxins, or trauma. Depending on severity and duration, injury may be reversible, allowing recovery, or irreversible, leading to cell death.General Mechanisms of Cell InjuryAlthough causes vary, most cellular injuries arise from a few key mechanisms that disrupt essential functions and often amplify one another. Cell survival depends on the extent and balance of these disturbances.ATP depletion...
Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic Obstructive Pulmonary Disease II: Emphysema

Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.

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In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer
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Decoding coal-induced pulmonary endothelial injury using single-cell omics.

Bing Li1, Jianhua Wang2, Yuanjie Zou1

  • 1School of Public Health, Anhui University of Science and Technology, Huainan, China.

Ecotoxicology and Environmental Safety
|September 6, 2025
PubMed
Summary
This summary is machine-generated.

Coal dust exposure damages lung endothelial cells (ECs) by increasing oxidative stress and disrupting cell adhesion, leading to reduced EC numbers. Macrophage signaling further contributes to EC loss in coal pneumoconiosis.

Keywords:
Coal dustCoal pneumoconiosisEndothelial injuryLung endothelial cellsSingle-cell RNA sequencing

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Area of Science:

  • Pulmonary Medicine
  • Cell Biology
  • Toxicology

Background:

  • Pulmonary endothelial injury is central to coal pneumoconiosis pathogenesis.
  • Mechanisms driving coal dust-induced endothelial damage are not fully understood.

Purpose of the Study:

  • To elucidate the molecular mechanisms of pulmonary endothelial injury in coal pneumoconiosis.
  • To characterize the impact of coal dust on lung endothelial cell subpopulations.

Main Methods:

  • Established a 9-month coal pneumoconiosis mouse model via intranasal coal dust exposure.
  • Utilized single-cell RNA sequencing (scRNA-seq) to analyze lung endothelial cells.
  • Employed CellChat analysis to investigate intercellular communication.

Main Results:

  • Identified four endothelial subpopulations: arterial (ArtECs), lymphatic (LECs), venous (VenECs), and capillary (CapECs).
  • Coal dust exposure increased oxidative stress, suppressed proliferation, and impaired cell adhesion and integrity.
  • Observed reduced EC numbers, particularly CapECs and ArtECs, with altered oxidative phosphorylation and adhesion pathways.
  • Disrupted macrophage-EC signaling (TGF-β, GDF axes) and identified potential macrophage-derived factors (LAMP2, LC3B) contributing to EC loss.

Conclusions:

  • Coal dust exposure induces lung endothelial cell dysfunction and loss through intrinsic and extrinsic pathways.
  • Findings provide insights into therapeutic targets for coal pneumoconiosis-related lung complications.